ASD pioneered the science of field spectroscopy over 25 years ago and continues to lead the industry with the world's most trusted field-portable NIR spectroradiometers.
The ASD FieldSpec 4 line of full-range spectroradiometers delivers the fastest and most accurate spectral field measurements available from any commercial field-portable spectroradiometer. Continued enhancements to core instrument spectrometers and other critical components have dramatically improved overall performance, signal, and integration speeds compared to earlier models.
The FieldSpec 4 spectroradiometer is designed specifically around the challenges researchers face when collecting spectral measurements in the field.
All ASD FieldSpec spectrometers and spectroradiometers provide 3nm spectral resolution in the VNIR (350 nm – 1000 nm) range. Three spectral resolution options are available for the SWIR (1001 nm – 2500 nm) range.
With 8 nm SWIR spectral resolution The FieldSpec 4 Hi-Res spectroradiometer is the instrument of choice for geological studies and atmospheric research.
The FieldSpec 4 Standard-Res spectroradiometer, with 10 nm SWIR resolution is perfectly suited for characterizing spectral features with a resolution of 10 nm to 50 nm, which covers the technical requirements of most field researchers. The FieldSpec 4 Standard-Res spectroradiometer has long been the industry’s go-to workhorse instrument for trusted field NIR spectroscopy and the scope of potential applications is broad.
Because of its wide optical slit the FieldSpec 4 Wide–Res spectroradiometer provides the highest signal throughput and offers the best signal to noise performance of any FieldSpec model. These high throughput characteristics also benefit field measurements taken in less than optimal illumination conditions. The 30 nm SWIR resolution of the FieldSpec 4 Wide–Res spectroradiometer makes it an ideal fit for applications such as vegetation analysis and vegetation indices that are characterized by broad spectral features. This instrument is also available at a significantly lower price point than other FieldSpec models, which makes it an attractive option when budgets are tight.
The ASD FieldSpec 4 leaves the factory floor calibrated as a spectroradiometer, ready for precise solar down-welling and irradiance measurements, but is equally suited for use as a spectrometer for accurate contact or stand-off reflectance analysis with a wide range of standard accessories.
Not all research needs are created equal and the spectral reflectance characteristics of different materials can vary greatly. In order to better accommodate this real-world variability, the ASD FieldSpec 4 is available with several spectral resolution options in the SWIR range, as well as the ultra-portable FieldSpec HandHeld 2 and HandHeld 2 Pro VNIR-only models.
Choosing the Right Spectral Resolution
What is Noise Equivalent Delta Radiance (NEdL)?
The go-to standard for trusted portable field spectroscopy
High-resolution spectral data from a ruggedized field-portable spectroradiometer
The high performance, cost effective spectroradiometer solution
The low-cost, easy to use, visible-near infrared (VNIR) alternative to the full-range FieldSpec 4 product line
The FieldSpec HandHeld 2 Pro offers greater sensitivity over our standard HandHeld 2 model
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